Files
khr@golang.org a129840779 runtime: be sure to scan small frame introduced by (*sigctxt).pushCall
On arm64, the contents of R30 are saved in this 16-byte frame (when
doing async preemption). But we don't scan that little frame. So any
pointer that was in R30 will not get scanned. So the object it points
to may get collected prematurely.

Fixes #80188

The test here is pretty quick (~1/3 sec) and fails ~50% of the time.

Change-Id: I46a7a6a25fabeb4f15dca96ee6fdd5e99d4c6323
Reviewed-on: https://go-review.googlesource.com/c/go/+/797521
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Keith Randall <khr@golang.org>
2026-07-13 14:06:37 -07:00
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